a professor or minister who is retired from assigned duties
"The emeritus professor still attends lectures occasionally, even though he officially retired years ago."
A person retired in this sense.
"Professor Smith, now emeritus, still visits campus to mentor his former students on Tuesdays."
honorably retired from assigned duties and retaining your title along with the additional title `emeritus' as in `professor emeritus'
"After thirty years of teaching, Dr. Evans was named professor emeritus upon his retirement, allowing him to keep his office while no longer grading papers."
Retired, but retaining an honorific version of a previous title.
"Professor Smith retired last year to become emeritus professor and continue mentoring students on campus."